Genuine OEM Kia Radiator Coolant Overflow Reservoir Tank For Optima 2016-2020 - Part 25430D4000

Here's a genuine OEM Kia part, not some aftermarket copy.

It's the radiator coolant overflow reservoir tank, also known as the expansion tank, for the Kia Optima from model years 2016 to 2020.

The manufacturer part number is 25430D4000, which crosses to 25430-D4000.

It's made in the Republic of Korea, so it's the same quality as the one that came on the car from the factory.

If your old tank is cracked, leaking, or just looks gross and yellowed, swapping it out for this brand new one will clean up your engine bay and keep your cooling system working right.

Direct replacement, genuine Kia.